![]() |
QxOrm
1.2.7
C++ Object Relational Mapping library
|
00001 /**************************************************************************** 00002 ** 00003 ** http://www.qxorm.com/ 00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com) 00005 ** 00006 ** This file is part of the QxOrm library 00007 ** 00008 ** This software is provided 'as-is', without any express or implied 00009 ** warranty. In no event will the authors be held liable for any 00010 ** damages arising from the use of this software 00011 ** 00012 ** Commercial Usage 00013 ** Licensees holding valid commercial QxOrm licenses may use this file in 00014 ** accordance with the commercial license agreement provided with the 00015 ** Software or, alternatively, in accordance with the terms contained in 00016 ** a written agreement between you and Lionel Marty 00017 ** 00018 ** GNU General Public License Usage 00019 ** Alternatively, this file may be used under the terms of the GNU 00020 ** General Public License version 3.0 as published by the Free Software 00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the 00022 ** packaging of this file. Please review the following information to 00023 ** ensure the GNU General Public License version 3.0 requirements will be 00024 ** met : http://www.gnu.org/copyleft/gpl.html 00025 ** 00026 ** If you are unsure which license is appropriate for your use, or 00027 ** if you have questions regarding the use of this file, please contact : 00028 ** contact@qxorm.com 00029 ** 00030 ****************************************************************************/ 00031 00032 #ifndef _QX_SQL_RELATION_ONE_TO_MANY_H_ 00033 #define _QX_SQL_RELATION_ONE_TO_MANY_H_ 00034 00035 #ifdef _MSC_VER 00036 #pragma once 00037 #endif 00038 00046 #include <QxDao/QxSqlRelation.h> 00047 00048 namespace qx { 00049 00054 template <class DataType, class Owner> 00055 class QxSqlRelation_OneToMany : public QxSqlRelation<DataType, Owner> 00056 { 00057 00058 private: 00059 00060 typedef typename QxSqlRelation<DataType, Owner>::type_owner type_owner; 00061 typedef typename QxSqlRelation<DataType, Owner>::type_data type_data; 00062 typedef typename QxSqlRelation<DataType, Owner>::type_container type_container; 00063 typedef typename QxSqlRelation<DataType, Owner>::type_generic_container type_generic_container; 00064 typedef typename QxSqlRelation<DataType, Owner>::type_item type_item; 00065 typedef typename type_generic_container::type_iterator type_iterator; 00066 00067 enum { is_data_container = QxSqlRelation<DataType, Owner>::is_data_container }; 00068 00069 public: 00070 00071 QxSqlRelation_OneToMany(IxDataMember * p, const QString & sForeignKey) : QxSqlRelation<DataType, Owner>(p) { this->m_eRelationType = qx::IxSqlRelation::one_to_many; this->m_sForeignKey = sForeignKey; qAssert(! this->m_sForeignKey.isEmpty()); } 00072 virtual ~QxSqlRelation_OneToMany() { BOOST_STATIC_ASSERT(is_data_container); } 00073 00074 virtual QString getDescription() const { return "relation one-to-many"; } 00075 virtual QString getExtraTable() const { return ""; } 00076 virtual QString createExtraTable() const { return ""; } 00077 virtual bool getCartesianProduct() const { return true; } 00078 virtual void createTable(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00079 virtual void lazySelect(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00080 virtual void lazyFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00081 virtual void eagerFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00082 virtual void lazyJoin(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00083 virtual void lazyWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00084 virtual void eagerWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00085 virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00086 virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00087 virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00088 virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00089 virtual void lazyInsert(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00090 virtual void lazyInsert_Values(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00091 virtual void lazyUpdate(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00092 virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00093 virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00094 virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); } 00095 00096 virtual QSqlError onAfterSave(QxSqlRelationParams & params) const 00097 { 00098 if (this->isNullData(params)) { return QSqlError(); } 00099 this->forceParentIdToAllChildren(params); 00100 if (! params.recursiveMode()) { return qx::dao::save(this->getContainer(params), (& params.database())); } 00101 else { return qx::dao::save_with_relation_recursive(this->getContainer(params), params.saveMode(), (& params.database()), (& params)); } 00102 } 00103 00104 virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const 00105 { return this->getIdFromQuery_OneToMany(bEager, params); } 00106 00107 virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const 00108 { this->updateOffset_OneToMany(bEager, params); } 00109 00110 virtual void eagerSelect(QxSqlRelationParams & params) const 00111 { this->eagerSelect_OneToMany(params); } 00112 00113 virtual void eagerJoin(QxSqlRelationParams & params) const 00114 { this->eagerJoin_OneToMany(params); } 00115 00116 virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const 00117 { this->eagerWhereSoftDelete_OneToMany(params); } 00118 00119 virtual void * eagerFetch_ResolveOutput(QxSqlRelationParams & params) const 00120 { 00121 if (! this->verifyOffset(params, true)) { return NULL; } 00122 QSqlQuery & query = params.query(); 00123 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return NULL; } 00124 IxDataMember * pForeign = this->getDataByKey(this->m_sForeignKey); qAssert(pForeign); if (! pForeign) { return NULL; } 00125 long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetForeign = (pForeign ? pForeign->getNameCount() : 0); 00126 long lOffsetOld = params.offset(); this->updateOffset(true, params); 00127 long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetForeign); 00128 long lRelation = 0; IxSqlRelation * pRelation = NULL; 00129 bool bValidId(false), bValidForeign(false); 00130 for (int i = 0; i < pId->getNameCount(); i++) 00131 { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); } 00132 for (int i = 0; i < pForeign->getNameCount(); i++) 00133 { QVariant vForeign = query.value(lOffsetOld + lOffsetId + i); bValidForeign = (bValidForeign || qx::trait::is_valid_primary_key(vForeign)); } 00134 if (! bValidId || ! bValidForeign) { return NULL; } 00135 type_item item = this->createItem(); 00136 type_data & item_val = item.value_qx(); 00137 if (! this->callTriggerBeforeFetch(item_val, params)) { return NULL; } 00138 for (int i = 0; i < pId->getNameCount(); i++) 00139 { QVariant v = query.value(lOffsetOld + i); qx::cvt::from_variant(v, item.key(), "", i); } 00140 for (int i = 0; i < pId->getNameCount(); i++) 00141 { QVariant v = query.value(lOffsetOld + i); pId->fromVariant((& item_val), v, "", i); } 00142 for (int i = 0; i < pForeign->getNameCount(); i++) 00143 { QVariant v = query.value(lOffsetOld + lOffsetId + i); pForeign->fromVariant((& item_val), v, "", i); } 00144 while ((p = this->nextData(lIndex))) 00145 { if (p != pForeign) { p->fromVariant((& item_val), query.value(lOffsetRelation++)); } } 00146 00147 if (params.relationX()) 00148 { 00149 long lIndexOwnerOld = params.indexOwner(); params.setIndexOwner(params.index()); 00150 void * pOwnerOld = params.owner(); params.setOwner(& item_val); 00151 lOffsetOld = params.offset(); params.setOffset(lOffsetRelation++); 00152 while ((pRelation = this->nextRelation(lRelation))) 00153 { if (this->addLazyRelation(params, pRelation)) { pRelation->lazyFetch_ResolveOutput(params); } } 00154 params.setOwner(pOwnerOld); params.setOffset(lOffsetOld); 00155 params.setIndexOwner(lIndexOwnerOld); 00156 } 00157 00158 if (! this->callTriggerAfterFetch(item_val, params)) { return NULL; } 00159 type_generic_container::insertItem(this->getContainer(params), item); 00160 return (& item_val); 00161 } 00162 00163 private: 00164 00165 void forceParentIdToAllChildren(QxSqlRelationParams & params) const 00166 { 00167 bool bForce = qx::QxSqlDatabase::getSingleton()->getForceParentIdToAllChildren(); 00168 if (! bForce || ! params.owner()) { return; } 00169 IxDataMember * pIdOwner = this->getDataIdOwner(); if (! pIdOwner) { return; } 00170 IxDataMember * pForeign = this->getDataByKey(this->m_sForeignKey); if (! pForeign) { return; } 00171 if (pIdOwner->getNameCount() != pForeign->getNameCount()) { return; } 00172 00173 QList<QVariant> vIdOwner; 00174 for (int i = 0; i < pIdOwner->getNameCount(); i++) 00175 { vIdOwner.append(pIdOwner->toVariant(params.owner(), i)); } 00176 00177 type_item item; 00178 type_container & container = this->getContainer(params); 00179 type_iterator itr = type_generic_container::begin(container, item); 00180 type_iterator itr_end = type_generic_container::end(container); 00181 00182 while (itr != itr_end) 00183 { 00184 type_data & item_val = item.value_qx(); 00185 for (int i = 0; i < vIdOwner.count(); i++) 00186 { pForeign->fromVariant((& item_val), vIdOwner.at(i), "", i); } 00187 itr = type_generic_container::next(container, itr, item); 00188 } 00189 } 00190 00191 }; 00192 00193 } // namespace qx 00194 00195 #endif // _QX_SQL_RELATION_ONE_TO_MANY_H_